Throttle disk write to prevent etcd puking during upgrade

clitools/pkg/node/fs.go

@@ -7,6 +7,7 @@ import (
 	"path/filepath"
 
 	monov1alpha1 "example.com/monok8s/pkg/apis/monok8s/v1alpha1"
+	"example.com/monok8s/pkg/controller/osimage"
 )
 
 func EngageControlGate(ctx context.Context, nctx *NodeContext) error {
@@ -30,3 +31,7 @@ func ReleaseControlGate(ctx context.Context, nctx *NodeContext) error {
 
 	return nil
 }
+
+func DiagTestDiskWrite(ctx context.Context, nctx *NodeContext) error {
+	return osimage.TestStreamToTarget(ctx, monov1alpha1.AltPartDeviceLink)
+}

clitools/pkg/node/kubeadm_upgrade.go

@@ -96,9 +96,6 @@ func resolvePauseImage(ctx context.Context, nctx *NodeContext, kubeVersion strin
 			continue
 		}
 
-		// examples:
-		// registry.k8s.io/pause:3.10
-		// some.registry.local/pause:3.10
 		if strings.Contains(line, "/pause:") || strings.HasPrefix(line, "pause:") {
 			return line, nil
 		}

clitools/pkg/node/mounts.go

@@ -36,7 +36,7 @@ func MountAltImageStore(ctx context.Context, nctx *NodeContext) error {
 			[]string{"-o", "ro", altDev, altRootMount},
 			system.RunOptions{Timeout: 30 * time.Second},
 		); err != nil {
-			return fmt.Errorf("mount alt rootfs %s on %s: %w", altDev, altRootMount, err)
+			klog.Errorf("mount alt rootfs %s on %s: %w", altDev, altRootMount, err)
 		}
 	}
 

clitools/pkg/node/uboot/ab.go

@@ -32,7 +32,7 @@ func ConfigureABBoot(ctx context.Context, nctx *node.NodeContext) error {
 				return fmt.Errorf("read boot state: %w", err)
 			}
 
-			bootPart := state["BOOT_PART"]
+			bootPart = state["BOOT_PART"]
 			if bootPart == "" {
 				return fmt.Errorf("BOOT_PART missing")
 			}

clitools/pkg/node/uboot/types.go

@@ -70,6 +70,6 @@ fi;
 setenv bootdev 0:${rootpart};
 setenv rootdev ${boot_source}:${rootpart};
 
-setenv bootargs "${bootargs_console} root=${rootdev} bootpart=${boot_part} rw rootwait rootfstype=ext4";
+setenv bootargs "${bootargs_console} root=${rootdev} bootpart=${boot_part} rw rootwait rootfstype=ext4 delayacct";
 ext4load ${boot_iface} ${bootdev} ${kernel_addr_r} /boot/kernel.itb && bootm ${kernel_addr_r};
 `